Global Patent Index - EP 3372556 A1

EP 3372556 A1 20180912 - A PLANT FOR THE PRODUCTION OF NITRIC ACID, A RELATED PROCESS AND METHOD OF REVAMPING

Title (en)

A PLANT FOR THE PRODUCTION OF NITRIC ACID, A RELATED PROCESS AND METHOD OF REVAMPING

Title (de)

ANLAGE ZUR HERSTELLUNG VON SALPETERSÄURE, ZUGEHÖRIGES VERFAHREN UND VERFAHREN ZUR UMARBEITUNG

Title (fr)

INSTALLATION POUR LA PRODUCTION D'ACIDE NITRIQUE, PROCÉDÉ ASSOCIÉ ET PROCÉDÉ DE MODERNISATION

Publication

EP 3372556 A1 20180912 (EN)

Application

EP 17159734 A 20170307

Priority

EP 17159734 A 20170307

Abstract (en)

A dual-pressure plant for the synthesis of nitric acid comprising: a reactor (4) providing a gaseous effluent (15) containing nitrogen oxides; an absorption tower (6) nitrogen oxides react with water providing raw nitric acid and, said absorption tower operating at a pressure greater than the pressure of the reactor; a compressor (5) elevating the pressure of the reactor effluent (15) to the absorption pressure; said plant also comprising a first bleacher (37) and a second bleacher (7), said first bleacher (37) stripping with air (39) nitrogen oxides from the output stream (27) of the absorption tower (6) providing a partially stripped nitric acid stream (40) and a nitrogen oxides-loaded air stream (41), the former being fed to the second bleacher (7) and the latter being recycled to the delivery-side of said compressor (5).

IPC 8 full level

C01B 21/26 (2006.01); B01D 53/02 (2006.01); B01D 53/56 (2006.01); C01B 21/28 (2006.01); C01B 21/46 (2006.01)

CPC (source: EP RU US)

B01D 53/02 (2013.01 - EP RU); B01D 53/1493 (2013.01 - RU US); B01D 53/56 (2013.01 - RU US); B01D 53/78 (2013.01 - RU US); C01B 21/26 (2013.01 - EP RU); C01B 21/28 (2013.01 - EP RU US); C01B 21/46 (2013.01 - EP RU US); B01D 53/56 (2013.01 - EP); B01D 2252/103 (2013.01 - US); B01J 2219/00024 (2013.01 - US)

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3372556 A1 20180912; AU 2018231281 A1 20190822; AU 2018231281 B2 20240215; BR 112019018373 A2 20200407; CA 3051636 A1 20180913; CN 110382412 A 20191025; EP 3592698 A1 20200115; EP 3592698 B1 20210728; RU 2019130677 A 20210407; RU 2019130677 A3 20210407; RU 2749600 C2 20210615; UA 124041 C2 20210707; US 11292719 B2 20220405; US 2020071167 A1 20200305; US 2022219985 A1 20220714; US 2022227628 A1 20220721; WO 2018162150 A1 20180913

DOCDB simple family (application)

EP 17159734 A 20170307; AU 2018231281 A 20180201; BR 112019018373 A 20180201; CA 3051636 A 20180201; CN 201880016052 A 20180201; EP 18702499 A 20180201; EP 2018052469 W 20180201; RU 2019130677 A 20180201; UA A201910127 A 20180201; US 201816491965 A 20180201; US 202217712551 A 20220404; US 202217713091 A 20220404